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Two Sunken Japanese Submarines Found Off Hawaii
Ponca City, We love you writes "The NY Times reports that two World War II Japanese submarines, including one meant to carry aircraft for attacks on American cities, have been found in deep water off Hawaii where they were sunk in 1946. Specifically designed for a stealth attack on the US East Coast — perhaps targeting Washington, DC and New York City — the 'samurai subs' were fast, far-ranging, and some carried folding-wing aircraft. Five Japanese submarines were captured by American forces at the end of the war and taken to Pearl Harbor for study, then towed to sea and torpedoed, probably to avoid having to share any of their technology with the Russian military. One of the Japanese craft, the I-201, was covered with a rubberized coating on the hull, an innovation intended to make it less apparent to sonar or radar; it was capable of speeds of about 20 knots while submerged, making it among the fastest diesel submarines ever made. The other, the I-14, much larger and slower, was designed to carry two small planes, Aichi M6A Seirans that could be brought onto the deck and launched by a catapult. The submarines were meant to threaten the United States directly, but none of the attacks occurred because the subs were developed too late in the war, and American intelligence was too good. 'It's very moving to see objects like this underwater,' says Hans Van Tilburg of the National Oceanic and Atmospheric Administration, 'because it's a very peaceful environment, but these subs were designed for aggression.'"
Back in tha day, they had to use a big boom arm for ships without a deck. For recovery, the aircraft would land next to the ship/sub and a big crane would just hoist them out of the water. this page shows a pretty similar process for an old OS2U-3 Kingfisher. Some pretty cool pix at the bottom of the page. I wouldn't want to be the pilot during recovery.
"Before God we are all equally wise - and equally foolish"
Albert Einstein
A little tangential here, but it may be interesting to engineering nerds.
I got a description of some of the workings of standard carrier catapults from a co-worker who used to be stationed on one. This is maybe 20 years old, so our tech may have changed since then. Apparently they have (had?) a supply of hour-glass shaped steel widgets on board color-coded to match the aircraft being launched. When it was time to launch, they would grab the appropriate size/color and insert it as an intentional weak-link in line with the cable before firing up the winch. When the cable was properly tensioned, the steel widget would break and release the cable throwing the plane into the air.
Kind of a neat design idea if you can't just haul the cable along fast enough to throw the plane.
He's getting rather old, but he's a good mouse.
As Stalin once said, quantity has a quality of its own. It's great it you can produce one tank that will kill five of the enemy's; until of course your enemy starts producing six tanks for every one of yours.
God invented whiskey so the Irish would not rule the world.